Home / 85,536.20-128,304.30-80,697.80

Finding the Fourth Proportional to 85,536.20, 128,304.30 and 80,697.80

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Solution

The fourth proportional to 85,536.20, 128,304.30 and 80,697.80 is: 121,046.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,536.20 : 128,304.30 = 80,697.80 : x
  2. Step 2: Convert to fraction form
    85,536.20/128,304.30 = 80,697.80/x
  3. Step 3: Cross multiply
    85,536.20x = 128,304.30 × 80,697.80
  4. Step 4: Simplify right side
    85,536.20x = 10,353,874,740.54
  5. Step 5: Solve for x
    x = 10,353,874,740.54/85,536.20
  6. Step 6: Final answer
    x = 121,046.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.